ATOM-15252 [Atom 0.8.5] Track View capture crashes when scene contains certain postfx

The crash was because the "BlendColorGradingLutImageAttachmentId" attachment got imported to attachment database twice.
This fix avoids import this attachment twice. It also avoid crash but only report a warning if an imported attachment wasn't used in any scope.
Enable both RHI and RPI validation (no visiable performance impact observed.

Gems/Atom/Feature/Common/Code/Source/PostProcessing/BlendColorGradingLutsPass.cpp

@@ -131,8 +131,13 @@ namespace AZ
             AZ_Assert(m_blendedLut.m_lutImage != nullptr, "BlendColorGradingLutsPass unable to acquire LUT image");
 
             AZ::RHI::AttachmentId imageAttachmentId = AZ::RHI::AttachmentId("BlendColorGradingLutImageAttachmentId");
-            [[maybe_unused]] RHI::ResultCode result = frameGraph.GetAttachmentDatabase().ImportImage(imageAttachmentId, m_blendedLut.m_lutImage);
-            AZ_Error("BlendColorGradingLutsPass", result == RHI::ResultCode::Success, "Failed to import compute buffer with error %d", result);
+
+            // import this attachment if it wasn't imported
+            if (!frameGraph.GetAttachmentDatabase().IsAttachmentValid(imageAttachmentId))
+            {
+                [[maybe_unused]] RHI::ResultCode result = frameGraph.GetAttachmentDatabase().ImportImage(imageAttachmentId, m_blendedLut.m_lutImage);
+                AZ_Error("BlendColorGradingLutsPass", result == RHI::ResultCode::Success, "Failed to import BlendColorGradingLutImageAttachmentId with error %d", result);
+            }
 
             RHI::ImageScopeAttachmentDescriptor desc;
             desc.m_attachmentId = imageAttachmentId;

Gems/Atom/RHI/Code/Source/RHI.Reflect/Base.cpp

@@ -16,6 +16,6 @@ namespace AZ
 {
     namespace RHI
     {
-        bool Validation::s_isEnabled = BuildOptions::IsDebugBuild;
+        bool Validation::s_isEnabled = BuildOptions::IsDebugBuild || BuildOptions::IsProfileBuild;
     }
 }

Gems/Atom/RHI/DX12/Code/Source/RHI/FrameGraphCompiler.cpp

@@ -404,6 +404,12 @@ namespace AZ
             Buffer& buffer = static_cast<Buffer&>(*bufferFrameAttachment.GetBuffer());
             RHI::BufferScopeAttachment* scopeAttachment = bufferFrameAttachment.GetFirstScopeAttachment();
 
+            if (scopeAttachment == nullptr)
+            {
+                AZ_WarningOnce("RHI", false, "Imported BufferFrameAttachment isn't used in any Scope");
+                return;
+            }
+
             D3D12_RESOURCE_TRANSITION_BARRIER transition;
             transition.pResource = buffer.GetMemoryView().GetMemory();
             transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
@@ -471,6 +477,12 @@ namespace AZ
             Image& image = static_cast<Image&>(*imageFrameAttachment.GetImage());
             RHI::ImageScopeAttachment* scopeAttachment = imageFrameAttachment.GetFirstScopeAttachment();
 
+            if (scopeAttachment == nullptr)
+            {
+                AZ_WarningOnce("RHI", false, "Imported ImageFrameAttachment isn't used in any Scope");
+                return;
+            }
+
             D3D12_RESOURCE_TRANSITION_BARRIER transition;
             transition.pResource = image.GetMemoryView().GetMemory();
 

Gems/Atom/RPI/Code/Source/RPI.Reflect/Base.cpp

@@ -16,6 +16,6 @@ namespace AZ
 {
     namespace RPI
     {
-        bool Validation::s_isEnabled = RHI::BuildOptions::IsDebugBuild;
+        bool Validation::s_isEnabled = RHI::BuildOptions::IsDebugBuild || RHI::BuildOptions::IsProfileBuild;
     }
 }